Combined type-writing and computing machine.



B. C. STICKNEY.

COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICAT1ON FILED JUNE 16. 19H.

Patented 4Q, 1919 9 SHEETSSHEET I.

INVENTOR:

WITNESSE B. C STICKNEYQ COMBINED TYRE WRITING AND COMPUTING MACHINE.

APPUCATION FILED EUHE W. 1914.

9 SHEETSSHEET 2.

iii.

B, C 'STiCKNEY comsmw TYPE wamm; AND COMPUTING MACHINE.

APPLSCATIUN HLEU JUNE \6, .914- fi Patented Mb. L, 1919.

9 SHEETS-SHEET 3.

B.C.ST1CKNE\Z COMBQNED TYPE wm'rme AND COMPUTING MACHINE.

APPLICATION YELED JUNE 16, 1914.

. 8. C, STiCKNEY, COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED JUNE I6. 1914.

Patented Feb. 4, 1919.

9 SHEETS-SHEET 5.

Mai 4 E u; t w E 1 0 l M w B. C. SHCKNEY.

GOMBIHED TYPE WRITING AND COMPUTING MACHINE.

APPLICATXON FILED JUNE 16' 1914. I

' Patented Feb. 1919.

9 SHEETS-SHEET 6.

WITN ass 3:

B. c. STTCKNEY. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED JUNE I6 1914.

Patente Feb 1919.

9 SHEETS SHEET I.

we? fo WET/94588758: L

B, G. 3T1CKNEY.

COMBlNED TYPE WRITING AND COMPUTING NACHINE..

@W m. m All! mu 525 w [7M N w .H m a.

9 SHEETSSHEET 8.

Patent e6; Feb, 4,1919.

APPLECATlON FILED JUNE I6. 1914.

r ".1 u Mb, 2 1919. 9 $HEETS-SHEET 9.

5 C. STECKNEY. COMBINED TYPE WRITHJG AND cowmme meme. APPLICATFOH F DJU!'1E1-S.i914.

urrnfo Application riled June 16, 191

To all ve/tom it may concern Be it hnown that L Bonmnut C. STICK.- EI, e. citizen in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful improvements in Combined Type-Writing and Computing Machines, of which the following is e specification,

lhis invention relates to a combined type- Writing and computing machine of a type adapted to efiect cross additions and subtractions, and in which the setting for addition and subtraction is effected automatically to correspond with predetermined addition and subtraction zones, and is an improvement on the construction disclosed in my Patent No. 1,186,520, issued June 6, 1916.

in my patent above mentioned, the numhers were set up or indexed digit by digit as Written by the typewriting mechanism, in as preliminary registering or representing mechanism, and then ell of the digits after having been indexed Were run up simulteneously into a computing head or tot-(diner. Several of these computing heads or totalisers were provided which could he jumped into register with tli actuating mechanism controlled from the preliminary representing mechanism, so as to receive numbers for difierent computing zones. These numbers could he run in one direction or the other in each totnlizer, for either ad ition or subtraction. by directly actuating the computing Wheels of the totzilizers indirectly actuatthem through an intermediate set of gears. The Shlfb for addition and subtraction, however, was performed manually.

in the present invention, the computing action takes place in the some manner as in my above-mentioned patent. with the exception that the manner in which the computation would he run into each totnlizer, that is, Whether l'or addition or .suht action, is controlled automatically, and from the typewriter carriage which travels to determine the' different digit columns and the different computing zones or columns.

The mechanism is set normally for eddition, will operete to run up numbers in an neenner except when in a subtraction computing zone or column. Then at tappet cursed by the carriage will come into of the United States, residing I BURQTHAJII C. STICKNE'Y, OF ELEZABETH, NEE 5" COMPUTING MACEHNE COMPANY, GE NE'W 3. 0325, FL, A S03E91 EY, ASaEIGNQE TO Serial Ho. 84%" engagement Wit a trip having a corresponding to the computing; zone and connected to release u latch. which nor-nul restrnins :i subtraction-Se.ting n n from operation. The'lzitc i on o no longer locks the suh 'grziction-s zinism in its ineffective latter is still held o the the computing mechanism it will permit the suhtrzictio -se nnisin to come into play. The setting mechanism enables an tween the computing ieels lnr totzilizer or coinputi I the actuating racks therefon so that; c outing wheels will be rotated for tn After the subtraction cpersti place, the mechanism will he our reset for addition, and will reins condition for the next computing 21c coluinn, unless there is another entrusting tu-ppet for that computing zone or column predeterinining e subtracting operation.

Other features and adrentages will hereinafter appear.

In the accompanying drawings-e Figure l is a. vertical perspective View, with parts omitted for the sake simplicity.

Fig. 2 is :1 top plan View of the ri end of the machine, with ports hrolc to show the underlying structure.

3 is a detail front view the righthand end of the machine, with partso. for the suite of simplicity.

l is a vertical section from front to rear, showing the parts in their inactive positions.

Fig. 5 is :1 detail horizontal section, showing the connection of the numeral keys to the levers which they actuate to set the pll'iS.

Fig. 6 is n detail view, showing one of the denominational bars depressed to position to have the pins thereon sets Fig. 7 is a view similar to Fi linkages ted to set 3. 15in on dep 2 rear View in elevation, shew :sition mechanism for setures I of the mechanism for jumping the series of totalizers from one computing zone to another, to bring into play each totalizer or computing head separately.

Fig. 10 is a detail view of the double-act ing tens-carrying mechanism, which operates either for addition or subtractionr Fig. 11 is a section through the clutch, which controls the connection of the ,tenscarrying mechanism to the general operator to be driven thereby solely during the re turn movement of the general operator.

Fig. 12 is a section through the adjacent portions of two computing heads, showing how they are spaced apart from each other. Fig. 13 is a vertical section taken from right to left through theclutching mechanism for rotating the tenscarrying assisting shaft in one direction or the other for addition or subtraction, and also showing the mechanism for shifting the racks in the case of addition, andthe floating pinions in the case of subtraction, into engagement with the computing wheels, the parts being shown in a condition to perform an: adding operation. Fig. 14: is a vertical section .taken from front to rear, showing the mechanism shifted during an adding operation, with the actuating racks in mesh with the gears on the computing wheels. 7

Fig. 15 is a view of the parts shown in Fig. 14, with the exception that the forward stroke of the general operator has been completed, and the actuating racks-moved out of engagement with the computing wheels for a return idle movement.

Fig. 16 illust1'ates'the" idle return movement of the actuating ra s from the posi tion shown in Fig. 15, and also-illustrates the active return movement of the general operator rack for a tens-carrying operation. A

Fig. 17 is adetail vertical section taken from front to rear, showing the mechanism set for subtraction, with the pawl which connects the adding cam thrownv out of operation, permitting the clutching pawl for the subtracting cam to come into opeiation.

Fig. 18 is a-vie w similar to Figs. 14 to 16, corresponding, however, to the adjustment of the parts in Fig. 17 for a. subtract.-

ing operation, and illustrating the general operator as having moved forward far enough to bring the floating idle pinio s into mesh with the gears of the computing wheels. This'view also shows how the latch for the subtraction-setting mechanism is tripped by the tappet carried by the earriage.

ing,*however, a slightly advancedst-ag of the movement during the forward/stroke of the general operator. I

Fig. 20 is a view similar to 13, with the exception that the clutch is fshifted for subtraction, so that the tens-carrying assist ing shaft will be rotated for ,a subtracting carrying, and showing the pawlwhich are shown after the subtraction, tappet has tripped the latch, and after the" general operator has moved partially fori'vard to effect the subtraction setting.

' Fig. 231 is a fragmentary top plan View,

35 Ward, to shift for subtraction. The parts showing the parts in the condition illustrated in Fig. 22.

.Numeral keys 1 and alphabet keys 2 (lepress key-levers 3 (Fig.4), to rock bell cranks 1, to swing type-bars 5 up rearwardly against the front side of a platen ,6,"mount,- ed to rotate on a carriage 7, which travels step by step at the striking of each key, under the control of an escapement mechanism indicated in general at 8, and in a manner common to Underwood typewriters.

The numeral keys 1, in addition to operating type actions, also effect a computing 65 operation. To do this, each numeral key depresses a thrust link 9 (Fig. 1) connected to rock one of a series'of levers 10 (Figs. 3 and 5), which are pivoted intermediate .their ends, as at 11, and force up at their rearends, thrust links 12. Each of th'ese thrust links is connected to a pin-setting linkage 13,50 as to operate the same at the actuation of the corresponding numeral key,

and raise the upper reach 14 thereof to engage one of a transverse row of pins 15, corresponding in value to the numeral key actuated. There is a row of pins 15 of the same value corresponding to each of the numeral keys, and these pins are also arranged in intersecting rows of values from 1 to 9, on denominational members 16. The pins, when set, determine theextent of movement of the denon'linational members 16, which are also actuating members, and drive in a manner to be described, computing wheels 17 of totalizers 18. a

The pins 15, however, are normally located beyond the sphere of operation of the pin-setting linkages 13. To bring each row of ins valued from 1 to 9 sucoessivel P a a y wit iin the range of the pin-setting linkages 13, there is provided a deno1nination-selecting i118 0i "i: in, which includes a series of denomina -controlling tappets 19 car icd by the carriage, there being one for each con'iputing zone or column desired.

the present instance, the tappets 19 are sho; i as adjustably mounted along a bail 26, which is secured in any suitable manner to the carriage 7. w

34210 5. tappet 19, as it into a computing zone or column, is c.,ed to engage and operate se'rz'at'im, a

transposition levers 21, which are on a rod 22. By rocking one end h lever 21, the opposite end is rocked to swing down an arm 23 thereof, which has a in-and-slot connection with the corresponding one of the denominational bars 16. will be noted in passing that the order of engagement of a tappet 19 with the transposition levers 21., is the reverse of the order of engagement of the arms 23 with the denominational bars 16. This is to enable the tappet 19, which proceeds from right to left with the travel of the carriage, to effect a selection from left to right of the denominational members in order to correspond with the computation which proceeds from l ft to right.

will be that each of the denominatioial bars 16 is depressed in order to bring row of pins thereon within the sphere of operation the pin-settinglinkages 13, so that a cross-selection will. be effected to a pin corresponding to the particular key actuated, and corresponding to the particular denominational or digit column being printed and computed in.

The pins when projected up above their fellows and above the denominational bars 16, determine the extent of movement of bars on a subsequent actuation of a FQZlGZ'Zll operator 2%. That is "to say, the pins jicctinto the path of cross bar 25 cargeneral operator, and move variedby the I able distances o carry with them their racks, 'o as to drive the computing wheels 17 varable amounts.

To the driving of the computing wheels, the denominational members 16 are provided with racks 26, which may be brought up into direct mesh with gears 27 provided on the computing wheels 17. With a direct mesh the rocks 26 with the gears an adfing operation is performed. If a t i operation is desired, intermeing and idle gears may be brought between the racks 26 and the gears 27, I as to rotate the computing Wheels 17 in the op os'te direction.

llormally, both the racks 26 and the gears 23 are out of mesh with the gears 2?. There is provided, however, means to alternatively brine- \Vltli tl\6qg(3fi1S 7, or the pinions 28 into either the racks 26 into direct mesh mesh with the gears 27, at the initial forward movement of the general operator 2i, before the cross bar 25 has come into engagement with one of the pins 1:), and thus before any of the denominational rack bars 16 have started forward.

To do this, the general operator 2% is provided with a rack 29 (Fig. 18), which drives a pinion 30 moshing to drive a gear 31. The gear 31 (Figs. 13 and 20) has secured for rotation therewith, an adding clutch disk 32, and a subtracting clutch disk 33. Normally, a spring 3-l (Fig. 17) holds a clutch pawl 35 in a position to be engaged by anotch or shoulder 36 on the adding clutch disk The pawl 35 is pivotally mounted by means of a pin 37 (Fig. 20), on an adding cam 38, and is arranged to clutch the adding cam 38 to the adding disk 32, so as to rotate with the gear 31. lhe pin 37 has secured thereto, on the opposite side of'the cam 38 from which the clutch pawl 35 is lo *ated, an arm 39, which underlies a pin fll), on a clutch pawl e1 pivoted to a subtraction cam disk l2. A spring 43 normally tends to urge the clutch pawl 41 into engagement with a notch or shoulder is on the subtracting clutch disk 33, but is restrained from so doing by the arm 39, which engages the pin 40, the spring 34 for the adding clutch pawl 35 being stronger than the spring 43 for the subtracting clutch pawl. It has thus been shown how the adding cam disk 38 is normally clutched in driven relation with the gear31, while the subtracting cam disk 42 is normally unclutched, that is, with respect to the gear 31.

During an adding operation, on the initial portion of the forward stroke of the general operator, the rack 29' rotates, through the gear 30, the gear 31, thus rotating the cam disk 38, so as to cause the latter, by its cam surface 45, to force an arm l6 out on to the periphery of the cam disk 38. The arm 46 is secured to the rock shaft :7, which also has secured thereto a pair of arms 48, carrying a cross bar 49, which extends through a series of alined slots 50 in the denominational bars 16 just below the racks 26 thereon. It will thus be seen that during the initial portion of the forward stroke of the general operator, the cam 38, by rocking the arms 46 and 48, forces the racks 26 up into mesh with the gears 27, so that by the time the cross bar 25 comes into engagement with any of the set pins 15, the racks'26 will be capable of driving 'the gears 27, and thus the computing wheels 17, for an adding operation.

If instead of an adding operation, a subtracting operation is desired, the adding clutch pawl 35 will be rendered silent by being lifted out of engagement with the shoulder 36, thereby permitting the spring 43 to act to shift the subtracting clutch ,i-dle pinions 2S backward into mesh with the driven relation with the gear 31 during a movement of the general operator 2%. Under such conditions, the adding cam will be silent, while an arm 51 will be forced by a cam surface out on to the periphery of the subtraction cam 42, so as to rock a shaft 53, to which the arm 51 is secured.

Also secured on the rock shaft 53, to be swung thereby, are one or more arms 54;, connected to a shift frame 55, which carries the series of idle pinions 28, and at the rotation of the subtraction cam 42, will carry the gears 27, the idle pinions 28 being always in mesh with the racks 26. This happens at the beginning of the forward stroke of the general operator, so that a drive will be effected for a subtracting operation between the denominational members 16 and the computing wheels 17 before any of the denominational members 16 have been started" in their for-- ward computing movement. A spring 118 (Figs. 1 and 3) returns the rock shaft 53 to its original position when the subtraction cam 42 com letes its revolution, thereby shifting the idle pinions 28 forwardly and breaking the driving connection between the racks 26 and the gears 27 on the computing wheels.

The shift from addition to subtraction is accomplished by a rock shaft 56 (Fig. 13), which carries an arm 57 arranged to engage the tail of the pawl 35, as in Fig. 17, and disengagethe nose of this clutching pawl from engagement with the adding clutch disk 3:2. The rock shaft 56 also eflects the change in drive for the tens-carrying mechanism, which will now be described.

Each computing wheel has a special starting tooth 58 (Fig. 10), which is a tens-carrying tooth, and engages once in a complete revolution, a mutilated gear ,59, to shift the same within the sphere of operation of one of two series of segments (30. The segments 60 ewtend in two spirals around an assisting .shaft 61, one series being for addition, and

the other series foi"snbtraction.

Normally, a mutilated portion of each gear 59 extends in opposition to a segment (30, but when shifted by the tens-carrying tooth, it brings a full portion of the gear into register with the segment 60, which completes the tens-carrying operation, so as to rotate a trident gear ()2 through one-third of a revolution. This trident gear 2 meshes with a tens-carrying gear (33 on the computing wheel of next higher denomination, and

. rotates the latter forwardly or backwardly one-tenth of a revolution, according to Whether an adding or a subtracting operation is taking place.

' The shaft (31 may be driven in one direction or the other according to whether the operation is an adding or a subtracting operation. For this purpose, there are loosely mounted on the shaft 61 (Fig, 13) two oppositely-facing bevel gears (Hand 65, which are joined together by an idle gear 66. Either of the gears 64 or 65 may be clutched in driving relation with the shaft (31, by means of a clutch 67, which has clutch teeth on opposite ends thereof, to alternatively engage corresponding clutch teeth provided on the gears 61, 65 1., To shift the clutch 67 from one position to another, there is provided a shifting yoke (58 (F 13 and 22) engaging in a circumferential groove in the clutch 67.

The yoke 68 is secured to the rock shaft 56, to be oscillated back and forth thereby.

The rotation of the gears 64 and 65 is effected from the gear 31, which, it will be remembered, is rotated by the general operator 24 during the back-and-forth stroke of the latter. The connection is such, however, that the gears 61 and ()5 will only be rotated during the return stroke of the general operator 24. For this purpose, there is provided a one-way clutch 70 (Figs. 11 and 13) which includes a ball or roller 71, normally urged by a spring 72 to project from a socket in the gear 65, to a position within a pocket 73 in.

- the gear 31. The pocket 73 is tapering, so as to form a cam surface, which, when the gear 31 rotates in one direction, during the forard stroke of the general operator, will' force the ball or roller 71 back into its socket in the head of the gear 65, so that the gear 31- will rotate idly without driving the gear 65.

During the couiiteriot-ation of the gear 31, on the return stroke of the general operator 24, the ball or roller 71 will be forced out into the pocket 73, and be engaged by the abrupt surface thereof, so that it will form a positive driving connection between the gear 31 and the gear 65, enabling the gear 65 to be rotated during the return stroke of'the general operator.

The gear 65, it will be remembered, is loosely mounted on the shaft 61, so that if the clutch 67 is in engagement therewith, it

will drive the shaft 61; whereas, if the clutch 67 is in engagement with the gear 64, the gear 65 will still drive the shaft ()1 through the gear 69 and the gear 64, but in the opposite direction. That is to say, when the clutch (37 is in engagement with the gear 65, the shaft 61 will be driven for an adding i also rocks the arm 57 to determine whether 130 subtracting carrying Mg a incense.

the racks 26 will be directly engaged with the gears 27 for an adding operation, or indirectly drive the same through the idle pinions 28 for a subtracting operation, may be rocked manually, but in the present instance, provision made whereby this rocking may be accomplished automatically.

To rock the shaft 56, and thus detern'iine the character of computation carried on, there is provided thereon an arm 7% (Fig. 22), which is engaged and rocked by a bell crank T This bell crank may be operated by a subtraction-setting mechanism including a bar 75 operated by a spring 77.

liorinally, the mechanism is set for addition. and the bar 7%; is locked against the tension the spring 7?, in the position shown in 1 1 i and 1a, by a spring latch which engages a notch provided in he latch 78 is connected be re app-ed v-inen the carriage 7 comes computing zone. by a tappet mounted on the bail carried u -age 7. The tappct 80 is arranged, when the carriage 7 comes into a subtracting computing zone, to engage a trip having a bearing surface 82 coextensive with the range of a computing zone, and, in trot, range i a computing zone, so as to maintain the tappetin engagement therewith, even lated and ,i

'itten in a particular computends ofthe bearing surface are beveled at 83 and 8 so as to enable met 80 to approach the same in oppolirections, and cam thetrip aside. The

may be extended "from the corredenominational selecting tappet shown in the present instance, to d on the same block, there being a sub'raction setting, and a 'dog for 'ional selecting, both for the same 'l pivotally mounted on the noun an extension 85 connected latch {18, which also pivoted on the u be seen that when the tappet JJiD'Sl, the latch 78 will be can til-'3 notch The spring 3 is not permitted to act at such the subtraction-setting mechai. in'iuding the bar 76, because of the this subtraction setting mechanism locked by a inc; 86 on the bau'YG, engaging sion of a shaft 87 which forms part operator 24. Thatis to say, so the general operator remains in a ationary home position, the subtraction- "ng niec' anism will be locked even after has been released. However, when the gen ral operator 2% is moved forward by any uitable motivemeans, such as the hand bell crank 88, the shatt- 87 will be omewhat greater than the e last di 'it has been accumuv r The trip 81 is shown in moved away from the lug 80, so that the spring 77 will be permitted to snap forward the bar 76, thereby rocking the bell crank 75, which in turn, through the arm Tel, rocks the. shaft 56.

As exolained before, when the shaft 56 is rocked in this manner, it will shift the clutch (3? t'rom its normal adding position shown in Fig. 13, to its subtracting position shown in Fig. 20. At the same time, the arm 5"! will strike the tail of the adding clutch pawl disengaging the same from its clutching disk 32, and permitting the spring 4-3 to engage the subtracting clutch pawl 41 with the subtracting clutch disk 33.

It is thus evident that whenever a sub tracting zone is reached, the carriage, through the intermediary of one or more of the tappets 80, accordin to the number of subtraction zones desired: will determine automatically the setting of the computing mechanism for a subtractingoperation.

it will be readily seen that when the general operator approaches the end of its return stroke, the shaft 87 will engage the lug 86, retension the spring 77, and permit the latch 78 to once more engage the notch 79, as soon as the carriage 7 pass s on toward the next computing zone, or, at least, passes out of the subtraction zone in which the subtracting operation took place. Of c0urse, tl1e general operator on its return stroke restores the set pins, and returns the denominational members 16 in the usual Way.

The various computing operations for the several computing zones might be all accumulated on one totalizer 18, but in the present instance, a group of totalizers is shown, so arr nged that they may be brought into register with the actuating mechanism at any predetermined time, and receive the computations, whether adding or subtracting, according to any predetermined plan.

For this purpose, there is provided a series of totalizers 18, arranged in end-to-end alinement and separated one from another. These totalizers 18 are mounted on a carriag 89, which may be traversed to bring the totalizers 18 successively into engagement or register with the computing or actuating mechanism. To do this, there is provided a spring barrel 90, connected to the carriage 89 by a draw-band 91. Normally a latch 92 is urged by a spring 93, into engagement with one of a series of lugs 94 on the carriage 89.

The series of totalizers with their carriage 89 is started to the right, with the totalizers at the left of the series in register with the actuating mechanism including the racks 26 and the idle pinions 28, together with the it is desired ,to have a new totalizer in register with tlie actuating mechanism, one of a series of appets or dogs 95 adjustably mounted on a rod 96 carried by the carriage 7, comes into engagement with a pawl 97 on the latch 92, tripping the latter, and permi-tting the sprin barrel 90 to jump the computing carriage 89 and totalizers carried thereby forward, to bringthe next total zer into register p'vith the actuating mechanism.

The tripping of the latch 92 takes place during a fractional portion of a letter-space movement of the carriage 7, so that the latch 92 will have been returned to a position to engage the nelx t 1ug94 on the carriage 89, and stop the carriage 89 with the next computing head or totalizer 18 in register with the actuating mechanism. This occurs durmg the travel of the carnage, as many times as'there are dogsijor tappets 95 on the carriage, and at po nts corresponding to the adding zone.

predetermined periods in the travel of the carriage at which it is desired to have the change in totalizers or computing heads.

The pawl 97 is abrupt on one side, so as to enable the rocking action of the latch 92 when approached during an advancing movement of the carriage 7 but is cam-- shaped or inclined on its opposite side, and capable of idle pivotal movement against the tension of a spring 98, so as to avoid.

unnecessary actions of the latch 92 during a return movement of the carriage 7 During the return movement of the carriage 7, an arm 99 on the rod 96 engages the computing carriage 89, and returns the same togetherwith all of the totalizers 18, to the starting position.

Summarizing briefly the operation, the

typewriter carriage 7 is started at the right of its travel, which also causes the starting of the computing carriage 89 at the right of its travel, with the initial computing head 18- in register with the actuating mecha nism. The numeral keys 1 are struck to ,cause the writing of a number in the first computing zone or column, which, we will assume for the purpose of illustration, is an The digits as they are written, are indexed digit by digit, by a setting up of the pins in the accordant denominational members 16.

After all of the digits have been indexed, the general operator is reciprocated by a movement of the hand crank 88, so that the adding cam 38, which is normally in action, will first shift the racks pinions 27, and then drive these' pinions amounts corresponding to the particular pins 15 set up, so as to run these numbers up in the dial or computing wheels 17.

The carriage 7 is then shifted to the next computing zone or column, and if one ofthe dogs the latch 92, to bring a new totalizsn OIiiCQnl- 26 to mesh with'the.

. of the general operator,

or tappets 95 is in position, it-will trip trip 81 will be actuated to release the latch 78 of the subtraction-setting mechanism, which, however, will not act immediately, because of thelug 86, which engages the shaft 87 of the general operator 24. The numeral keys 1 are again struck, to write and index the digits. of the number to be subtracted. These digits will be setup in the usual manner digit by digit, in the nest of pins 15, so as to afford a preliminary representation of the number to be subtracted.

After all of the digits. have been so indexed,

the hand crank 88 will be started forward.

As soon as the shaft 87 moves away from the lug 86, the spring 77 will act to snap forward the subtraction-setting mechanism including the bar 76, which will rock the lever 75, and thereby rock the shaft 56. The

rocking of the shaft 56 willshift the,elutch, 67 from the Fig. 13 position, which is an adding position, to the Fig. 20 position, which is a subtracting position, atthe same time bringing the arm 57 down into engagement with the tail of the adding clutch pawl 35, disengaging it from its,notch 36 in the adding clutch'disk 32. The adding shiftmgcam 38 will therefore be silent, but the very disconnection of the pawl 35 Will permit the spring 43 to force the subtracting clutch pawl 41 into engagement with its clutching disk 33, so that the connection of the subtracting shifting cam 42 to the rotating gear 31 will be completed. Then the further advancing movement of the general operator,'through the rotation of the gear -31 and the subtraction-setting cam 42, will shift the idle pinions 28 into-mesh with the gears 27 on the computing wheels 17, enabling the racks 26, during the continued forward movement of the general operator 24, to rotate the computing wheels 17 in the direction to subtract thenumber indexed. The idle pinions 28 are returned totheir normal positions at the conclusion of the revolution of the cam 42 by the spring 118.

Any tens-carrying operation which may be initiated will be completed during the return stroke by the tens-carrying mechanism including the assisting shaft 61 and the segments 60 thereon.

During the return stroke of the general operator, the mechanism will be reset for addition, by the shaft 87 coming into enduring this forward movement,

1,293,23 i as;

gagement with the log 86, retensioning the spring 77, and bringing the notch 7 9 into register with the latch 78. When the carriage 7 moves to the next computing zone or column, the tappet will escape from the trip 81, permitting the latch 78 to be forced by its spring into the notch 79, locking the subtraction-setting mechanism against action.

If the next computing zone should be an adding one and lack one of the subtraction tappets 80, the mechanism will then be in a condition for normal adding operation. If the next computing zone sliouldbe a subtraction one, another tappet 80 would be in position, so as to'again trip the latch 78, permitting a subtracting operation.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim 1. The combination, with a series of com puting wheels, and actuating members individual thereto; of floating pinions mounted intermediate said computing wheels and actuating members, and shiftable into position to complete a driving connection therebetween, but normally ineffective for such shift; controlling means operable to render said pinions effective for such shift; automatic means coming into play at a predetermined point -in a series of computa tions, for operating said controlling means; and means for thereafter so shifting said pinions.

2. The combination, with a series of coinputing wheels, and actuating members individual thereto; of floating pinions mounted intermediate said computing wheels and actuating members, and shiftable into position to complete a driving connection therebetween, so as to enable a subtraction computation to be performed, but normally ineffective for such shift; controlling means .operable to render said pinions effective for such shift; automatic means coming into play at a predetermined point in a series of computations, for operating said controlling means; means for thereafter so shifting said pinions; and automatic means for re turning. said pinions to interrupting-position at the conclusion of the subtracting operation to break such driving connection.

3. The combination with a series of computing wheels, of a series of rack bars, one individual to each of said computing wheels for driving said computing wheels, means for shifting said rack bars into direct engagement with said computing wheels to eifect an addingcomputation, a series of 'idlepinions shiftable into position to efiect an indirect drive from said rack bars to said computing wheels so as to enable a subtracting computation, but normally inefiective for such shift, automatic means coming the travel or" said carriage to disengage said into play mechanically at a predetermined point in a series of computations to enable the shifting of said idle pinions into position to effect said indirect drive between said rack bars and said computing wheels s for a subtracting operation, and means for thereafter so shifting said pinions.

l. The combination with a series of corn: puting wheels, of a series of actuating members for driving said computing wiieels, a 2'5 series of idle pinions capable oi"- completing a train of gearing from said actuating members to said computing wheels, a carriage traveling to determine different computing zones or olumns, and carriage-operated ac means for determining the effectiveness oi? said idle pinions to complete the train of gearing between said actuating members and said computing wheels.

5. The combination with a series 0' puting wheels, of actuating mechanism :icr said computing wheels including direct drive for addition and an indirectdi'w ggroi:

or columns, and carriage-carried means for controlling whether the drive to said computing wheels vill be direct or indirect for an adding or a subtracting computation.

6. The combination with a series of computing wheels, of a series of racks for driv ing said computing wheels, there being one rack for each of said computing wheels, a series of idle pinions for driving said com- 1% puting wheels, there being one idle pinion for each computing wheel, a cam. for shift ing said racks into engagement with said computing wheels, a cam for shitting said pinions into engagement with said computing wheels, a carriage traveling to determinediti'erent computing zones, and means carried by said carriage for silencing pne of said cams and bringing into play the other of said cams. i.

ill 7. The combination with a series oi computing wheels, of actuating mechanism driving said computing wheels, a pair cams controlling the character of drie said computing wheels by s actua ried by said carriage and arranged to engage said trip at a predetermined point in latch, and bring said subtraction-setting mechanism into play, so as to render effective the clutching mechanism for the subt1tlCtl0I1SettlI1g mechanism.

8. The combination with a series of computingljvheels, of actuating mechanism for said computing wheels arranged to selectively dr'i've said computing wheels in one direction or the other for addition or subtraction, tens-carrying mechanism for said computing wheels, driving mechanism for said tens-carrying mechanism arranged to drive the same in one direction or the other according to addition or subtraction, and state-changing'means for changing the direction of drive of said computing wheels by said actuating mechanism, and also changing the direction of drive of said tenscarrying mechanism, said state-changing means including a rock shaft, connections operated by said rock shaft for controlling the direction of drive of said computing wheels by said actuating mechanism, connections on said rock shaft for controlling the direction of drive of said tens-carrying mechanism by said driving mechanism, a bell crank for oscillating said rockshaft, a bar for actuating said bell crank, and a spring for actuating said bar.

9. The combination with a series of computing. wheels, of actuating mechanism for said computing wheels arranged to selectively drive said computing Wheels in one direction or the other for addition or subtraction, tens-carrying mechanism for said computing Wheels, driving mechanism for said tens-carryingmechanism arranged to drive the same in one direction or the other according to addition or subtraction, statechanging means for changing the direction of drive of said computing wheels by said actuating mechanism, and also changing the direction of drive of said tens-carrying niechanism,'saicl state-changing means in- 7 tion of drive of eluding a rock shaft, connections operated by said rock shaft for controlling the direcsa-id computing wheels by said actuating mechanism, connections on said said rock shaft for controlling the direction of drive of said anism by said'driving mechanism, a bell crank for oscillating said rock shaft, a bar for actuating said bell crank, a spring for actuating said bar, a latch normally restrain.- ing said bar from actuation, and means for releasing said latch.

10. The combination with a series'of computing Wheels, of actuating mechanism for said computing wheels arranged to selectively drive said computing wheels in one direction or the other for addition or subtraction, tens-carrying mechanism for said computing Wheels, driving mechanism for said ,tens-carrying mechanism arranged to drive the same in one direction or the other acdirection of drive tens-carrying mechbell crank, a spring for actuating said bar, a

latch normally restraining said bar from actuation, means for-releasing said latch, and a general operator for driving said driving means and said actuating mechanism connected to manipulate said bar and retension said spring. v v 11. The combination with a series of computing wheels, of an actuating mechanism for driving said computing wheels in one direction or the other for addition or subtraction, setting mechanism for determining the of said computing wheels by said actuating mechanism, a general op-- erator for driving said actuating mechanism, and restraining means controlled from said general operator for preventing the action of said setting mechanism until said general operator itself has started in motion.

12. The combination with a series of computing wheels, of an actuating mechanism for driving said computing wheels in one direction or the other for addition or subtraction, setting mechanism for determining the direction of drive of said computing wheels by said actuating mechanism, a general operator for driving said actuating mechanisn'i, means tending to operate said setting mechanism, a latch for rest-raining said setting mechanism, means for releasing said latch, and cooperating parts on said general operator and said setting mechanism restraining said setting mechanism from action after said latch has been released and until said general operator itself starts in motion.

, 13. The combination with a series of computing Wheels, of an actuating mechanism for driving said computing wheels in one direction or the other for addition or subtraction, setting mechanism for determining the direction of drive of said computing wheels by said actuating mechanism, a general operator for driving said actuating mechanism, a lug on said setting mechanism, and a projection on said general operator lying in the path of said lug to prevent the action of said setting mechanism until said general operator has started in its movement.

14. The combiantion with a series of computing wheels, of a change drive for said 130 other for addition or subtraction, denomina-- tional selecting mechanismfor said comput-' ingwheels,a carriage traveling to determine different computing zones, shifting means for effecting a change in said change drive, a trip for controlling said shifting means having a bail co-extensive'with the range of a computing zone as determined by said denominational selecting mechanism, and a tappet for operating both said denominational selecting mechanism and said trip. V y

15. The combination with a series of compitting wheels, of a change drive actuating mechanism for siti(l computing wheels, shifting mechanism for, effecting a change in the drive of said actuating mechanism, tripping mechanism for saidshiiting mechanism including a bail having, a bearing surface of a range at least equal to that of a computing zone, a carriage traveling to determine computing zones, and a tappet carried by said carriage arranged to engage said bail during the period of a computing zone and to main- 1 tainsaid tripping mechanism in its actuated.

position.

16. The combination with a series of computing heads, each having a series of computing wheels, of actuating mechanism having a capacity equal to a single computing head and all the wheels thereof, whereby all the digits of a number'may be simultaneously run up into a single computing head, a carriage traveling to determine diflerent computing zones and arranged to effect a relative traveling movement between said actuating mechanism and said computing wheels, so as to bring said computing heads individually within the range ot'said actuating mechanism, said actuating mechanism having a change drive so as to drive said computing Wheels in one direction or the other, and automatic means controlled from said carrings for simultaneously jumping a new computing head into the range of said actuating mechanism and changing the direction of drive of said actuating mechanism.

17. The combination with a plurality of computing heads, each of said computing heads having a series of computing wheels, of actuating mechanism for said computing heads'having a capacity equal to a single computing head and all of the wheels thereof,

whereby all of the digits of a number may be simultaneously run up into a single computing head, said actuating mechanism having a change drive so as to rotate the wheels of a computing head in one direction or the other according to addition or subtraction, shifting mechanism for controlling said change drive, a carriage traveling to determine different computing zones or columns, means for jumping said computing heads so as to shift one of said computing heads out of the actuating mechanism to carry on different 1 types of computation.

18. The combination with a series or? computing heads, arranged in groups of actuating mechanism having a capacity oi" a.

single group, so as to drive all the computing wheels or a single group at one and the same time, a carriage traveling step by step to control denominational selections of said actuating mechanism for a single group, means for jumping said computing wheels a distance aggregating a number or" step-bystep movements, to bring different groups within the range of said actuating mechanism, means for changing the direction of drive of said computing Wheels by said acltuating mechanism, and controlling mechanism carried by said carriage for concomitantly effecting a change in the group of computing wheels within the ange of said actuating mechanism, and a change in the direction of drive of the computing wheels by said actuating mechanism.

19. The combination, with a series of computing wheels, and actuating mechanism therefor; of a pair of cams for controlling the character of computation effected by ,said computing wheels by said actuating mechanism; a carriage traveling to deten mine different computing zones; and means carried by said carriage for silencing one cam and bringing the other into play, when the carriage reaches a predetermined zone. 20. The combination, with a-series of computing wheels, and actuating mechanism therefor; of a pair of cams'for controlling the character of computation efiected by said computing wheels by said actuating mechanism; a carriage traveling to determine different computing zones; a drive shaft whereon said cams arelooseiy mounted; clutching mechanisms, one individual to each cam, for connecting said cams individually with said shaft, said clutching mechanisms being interdependent in their action, so that when one is effective, the other is ineffective: and means carried by said carriage i or automatically rendering one of said clutching mechanisms effective when the carriage reaches a predetermined zone. I

21. The combination, with a series of computing wheels, and actuating mechanism therefor; of a pair of cams for controlling the character of computation effected by said 1 nism; a carriage traveling to determine different computing zones; a drive shaft Whereon said cams are loosely mounted; clutching mechanisms, one individual to each cam, for connecting said cams individually with said shaft, said clutching mechanisms being interdependent in their action, so that when 'one is effective, the other is ineffective; subtraction-setting mechanism for rendering one of said clutching mechanisms effective; and means carried by said carriage for controlling said setting mechanism.

22. The combination, with a series of computing Wheels, and actuating mechanism therefor; of a pair of companion elements associated with said actuating mechanism for controlling the character of computation effected by the latter by said computing Wheels; a carriage traveling to determine different computing zones; mechanism for rendering one of said elements efiective and the other ineffective; and means dependent upon the travel of said carriage for actuating the last-named mechanism.

23. The combination, with a series of com puting wheels, and actuating mechanism therefor; of a pair of companion elements associated with said actuating mechanism for controlling the characterof computation effected by the latter by said computing Wheels; a carriage traveling to determine different computing zones; mechanism for rendering one of said elements effective and the other ineffective; a latch controlling the last-named mechanismfand a member car-. ried by said carriage for automatically releasing said latch when said carriage reaches a predetermined zone.

24. In a combined typewriting and computing machine, the combination with a traveling carriage for determining difiierent computing zones and a series of computing wheels, of actuating mechanism for selectively driving said computing wheels in one direction or the other for addition or subtraction,"a carriage controlled setting mechanism for determining the direction of drive of said computing wheels by said actuating mechanism, a general operator. for driving said actuating mechanism and cooperating parts on said general operator and said setting mechanism restraining said setting mechanism from action until said general operatorhas started in its movement.

25. In a combined typewriting and computing machine, the combination with a traveling carriage and a series of computing wheels; of actuating mechanism for selectively driving said computing wheels in one direction or the other .for addition or subtraction; carriage controlled setting mechanism for determining the direction of drive of said computing wheels by said actuating mechanism; said setting mechanism including an operating bar, and means tending to actuate the same; a general operator for driving said actuating mechanism; a latch normally restraining said bar; means for releasing said latch; and means to prevent the action of said bar after said latch has been released and until said general operator itself starts in motion.

26. The combination, with a series of computing wheels; of actuating mechanism for selectively driving said computing Wheels in one direction or the other for addition or subtraction; and state-changing means for changing the direction of drive of said computing wheels by said actuating mechanism, said state-changing means including a rock shaft, connections operated by said rock shaft for controlling the direction of drive of said computing wheelsby said actuating mechanism, a bell crank-for oscillating said rock shaft, a bar for actuating said bell crank, means tending to actuate said bar, a latch normally restraining said bar, and means for releasing said latch.

27. The combination, with'a series of computing wheels; of actuating members individual to said computing wheels; idle pinions floatingly mounted between said actuatingmembers and said computing wheels and shiftable into position to complete a driving connection between said actuating members and said computing wheels, but normally'inefi'ectivefor such shift; controlling means operable to render said pinions efiective for such shift; a carriage traveling to determine different computing zones; automatic means coming into play when the carriage reaches a predetermined zone for operating said controlling means, and means for thereafter, so shiftin' said idle pinions. BURNHA C. STICKNEY. WVitnesses:

'W. O. WESTPHAL, J oLIUs Docks'rnvn. 

